Table 1:
Characteristics of a case-cohort study of male underground uranium miners in the Příbram region of the Czech Republic 1977–1996
| Subcohort non-cases | Lung cancer cases | Extrathoracic cancer cases | |
|---|---|---|---|
| Total cases, n | 1621 | 890 | 127 |
|
| |||
| Year of birth, n (%) | |||
|
| |||
| < 1910 | 87 (5) | 30 (3) | 4 (3) |
| 1910 – 1919 | 342 (21) | 185 (21) | 17 (13) |
| 1920 – 1929 | 677 (42) | 403 (45) | 39 (31) |
| 1930 – 1939 | 367 (23) | 212 (24) | 33 (26) |
| ≥1940 | 148 (9) | 60 (7) | 34 (27) |
| Age at start of employment (years), n(%) | |||
| <20 | 99 (6) | 59 (7) | 12 (9) |
| 20-<30 | 677 (42) | 379 (43) | 63 (50) |
| 30-<40 | 528 (33) | 313 (35) | 36 (28) |
| ≥40 | 317 (20) | 139 (16) | 16 (13) |
| Duration of employment (years) | |||
| 1-<3 | 632 (39) | 250 (28) | 61 (48) |
| 3-<10 | 351 (22) | 190 (21) | 24 (19) |
| ≥10 | 638 (39) | 450 (51) | 42 (33) |
| Cumulative exposure, mean (range) | |||
| Radon (WLM) | 78 (0– 959) | 115 (0– 1022) | 69 (0– 866) |
| Smoking status | |||
| Ever Smoker | 1027 (63) | 731 (82) | 95 (75) |
| Never Smoker | 506 (31) | 121 (14) | 24 (19) |
| Missing | 88 (5) | 38 (4) | 8 (6) |